What is the most complex ecosystem in the world? select one: a. rainforest b. savanna c. desert d. tundra

Why are shark population in decline worldwide?

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks

In a class of 20 students, what democratic form of governance makes the most sense